Substituent and solvent effects on the photo-physical properties of some coumarin dyes

Absorption and fluorescence spectra of three coumarin dyes with various substituents and alkyl groups have been recorded in solvents in the range of 200–730 nm. The photo-physical behavior of dissolved dye depends on the nature of its environment, i.e. the solvatochromic behaviors of coumarin dyes a...

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Published in	Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy Vol. 77; no. 2; pp. 337 - 341
Main Authors	Zakerhamidi, M.S., Ghanadzadeh, A., Tajalli, H., Moghadam, M., Jassas, M., Hosseini nia, R.
Format	Journal Article
Language	English
Published	England Elsevier B.V 01.10.2010
Subjects	Absorption Coloring Agents - chemistry Coumarin dyes Coumarins - chemistry Hydrogen Bonding Indicators and Reagents - chemistry Light Linear solvation energy relationships Molecular Structure Orientation polarizability Solvent polarity scale Solvents - chemistry Solvent–solute interactions Spectrometry, Fluorescence Solvent–solute interactions Solvent polarity scale Coumarin dyes Linear solvation energy relationships Orientation polarizability
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Abstract	Absorption and fluorescence spectra of three coumarin dyes with various substituents and alkyl groups have been recorded in solvents in the range of 200–730 nm. The photo-physical behavior of dissolved dye depends on the nature of its environment, i.e. the solvatochromic behaviors of coumarin dyes and solvent/solute hydrogen bonding interactions can be analyzed by means of linear solvation energy relationships concept proposed by Kamlet and Taft. The intensity, shape, and maximum wavelength of the absorption and fluorescence band of these dyes in solution depend strongly on the solvent–solute interactions and solvent nature. Hydrogen bonding interactions (specific solute–solvent interactions) between these dye–solvent complex and dipolarity/polarizability (non-specific solute–solvent interactions) control reorientation of solvent molecules around the dye.
AbstractList	Absorption and fluorescence spectra of three coumarin dyes with various substituents and alkyl groups have been recorded in solvents in the range of 200–730 nm. The photo-physical behavior of dissolved dye depends on the nature of its environment, i.e. the solvatochromic behaviors of coumarin dyes and solvent/solute hydrogen bonding interactions can be analyzed by means of linear solvation energy relationships concept proposed by Kamlet and Taft. The intensity, shape, and maximum wavelength of the absorption and fluorescence band of these dyes in solution depend strongly on the solvent–solute interactions and solvent nature. Hydrogen bonding interactions (specific solute–solvent interactions) between these dye–solvent complex and dipolarity/polarizability (non-specific solute–solvent interactions) control reorientation of solvent molecules around the dye. Absorption and fluorescence spectra of three coumarin dyes with various substituents and alkyl groups have been recorded in solvents in the range of 200-730 nm. The photo-physical behavior of dissolved dye depends on the nature of its environment, i.e. the solvatochromic behaviors of coumarin dyes and solvent/solute hydrogen bonding interactions can be analyzed by means of linear solvation energy relationships concept proposed by Kamlet and Taft. The intensity, shape, and maximum wavelength of the absorption and fluorescence band of these dyes in solution depend strongly on the solvent-solute interactions and solvent nature. Hydrogen bonding interactions (specific solute-solvent interactions) between these dye-solvent complex and dipolarity/polarizability (non-specific solute-solvent interactions) control reorientation of solvent molecules around the dye.
Author	Tajalli, H. Hosseini nia, R. Moghadam, M. Ghanadzadeh, A. Jassas, M. Zakerhamidi, M.S.
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Keywords	Solvent–solute interactions Solvent polarity scale Coumarin dyes Linear solvation energy relationships Orientation polarizability
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Snippet	Absorption and fluorescence spectra of three coumarin dyes with various substituents and alkyl groups have been recorded in solvents in the range of 200–730... Absorption and fluorescence spectra of three coumarin dyes with various substituents and alkyl groups have been recorded in solvents in the range of 200-730...
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SubjectTerms	Absorption Coloring Agents - chemistry Coumarin dyes Coumarins - chemistry Hydrogen Bonding Indicators and Reagents - chemistry Light Linear solvation energy relationships Molecular Structure Orientation polarizability Solvent polarity scale Solvents - chemistry Solvent–solute interactions Spectrometry, Fluorescence
Title	Substituent and solvent effects on the photo-physical properties of some coumarin dyes
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